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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/6347

Title: Orbital angular momentum correlations with a phase-flipped Gaussian mode pump beam
Authors: Romero, J
Giovannini, D
McLaren, MG
Galvez, EJ
Forbes, A
Padgett, MJ
Keywords: Orbital angular momentum
OAM
Optics
Gaussian pump beams
Quantum optics
Lasers
Spontaneous parametric down-conversion
Issue Date: Aug-2012
Publisher: European Optical Society
Citation: Romero, J, Giovannini, D, McLaren, M.G, Galvez, E.J, Forbes, A and Padgett, MJ. 2012. Orbital angular momentum correlations with a phase-flipped Gaussian mode pump beam. Journal of Optics, Vol. 14 (8), doi:10.1088/2040-8978/14/8/085401
Series/Report no.: Workflow;9627
Abstract: We report orbital angular momentum (OAM) and angle correlations between signal and idler photons observed when the nonlinear crystal used in spontaneous parametric down-conversion is illuminated by a non-fundamental Gaussian pump beam. We introduce a p-phase step to the transverse profile of the pump, before it impinges on the crystal to create a phase-flipped Gaussian mode, which is a close approximation to an HG10 Hermite–Gaussian-like beam. The correlations in OAM and angular position are then measured holographically using two separate spatial light modulators in the signal and idler arms. We show the transfer of the OAM spectrum of the pump to the down-converted fields, manifested as a redistribution in the OAM correlations consistent with OAM conservation. This corresponds to a modulation of the angular position correlations consistent with the Fourier relationship between the OAM and angle.
Description: Copyright: 2012 European Optical Society. This is an ABSTRACT ONLY. The definitive version is published in Journal of Optics, Vol. 14 (8), doi:10.1088/2040-8978/14/8/085401
URI: http://iopscience.iop.org/2040-8986/14/8/085401/
http://hdl.handle.net/10204/6347
ISSN: 2040-8978
2040-8986
Appears in Collections:Laser physics and technology
General science, engineering & technology

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